| 基于Raptor码的视频多播跨层优化算法 |
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| 引用本文： | 钱晓捷,王超.基于Raptor码的视频多播跨层优化算法[J].计算机科学,2016,43(8):50-54. |
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| 作者姓名： | 钱晓捷 王超 |
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| 作者单位： | 郑州大学信息工程学院 郑州450001,郑州大学信息工程学院 郑州450001 |
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| 基金项目： | 本文受国家自然科学基金项目(61379079)资助 |
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| 摘 要： | 在第4代移动通信中,人们更加关注移动宽带网络传输的服务质量(QoS),尤其是多输入多输出(Multiple-Input-Multiple-Output,MIMO)系统下的视频多播方面。提出了一种基于Raptor码的视频多播跨层优化算法,通过Raptor码和其他纠错码的包误差率的对比分析,选择合适的Raptor码率和调解编码方案(MCS)模式进行优化组合,在增大系统吞吐量的同时可以提高信道资源(时隙)利用率。仿真实验表明,该算法在下行链路的吞吐量至少增加了28%,节约了至少18%的信道资源；在SNR=11.5时,BUS序列的客观重建质量(PSNR)的性能增益可达到4dB以上。
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| 关 键 词： | 多输入多输出 视频多播 服务质量 Raptor码 跨层优化算法 |
| 收稿时间： | 2015/7/14 0:00:00 |
| 修稿时间： | 2015/11/2 0:00:00 |
Cross-layer Optimization Algorithm Based on Raptor Code for Video Multicast |
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| QIAN Xiao-jie and WANG Chao.Cross-layer Optimization Algorithm Based on Raptor Code for Video Multicast[J].Computer Science,2016,43(8):50-54. |
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| Authors: | QIAN Xiao-jie and WANG Chao |
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| Affiliation: | School of Information Engineering,Zhengzhou University,Zhengzhou 450001,China and School of Information Engineering,Zhengzhou University,Zhengzhou 450001,China |
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| Abstract: | In the fourth generation mobile communication,people pay much more attention to quality of service(QoS) of mobile broadband network transmission in video multicast based on multiple-input-multiple-output(MIMO) system.Video multicast cross-layer optimization algorithm based on Raptor code was proposed.By analyzing packet error rate between Raptor code and other erasure code,and selecting the appropriate Raptor rate and modulation and coding scheme (MCS) model in order to optimize the combination,the throughput of the system can be increased and the channel resource (time slot) utilization can also be improved.Simulation shows the algorithm has better throughput at least 28%,and saves the channel resources at least 18%.In addition,when SNR is 11.5,PSNR performance gain of BUS sequence can reach more than 4dB. |
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| Keywords: | MIMO Video multicast QoS Raptor codes Cross-layer optimization algorithm |
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